Because you care, you will want to show your best side to the other person, and don't want the other person to see your embarrassing side.
Everyone is.
It was as if an adolescent boy was secretly in love with the other person. He stretched out his hand to touch her, but then quickly withdrew his hand at the last moment when he was about to touch her.
Yes, I want to... Know a little more about the other person, even a little bit.